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  • م.م وديان عباس احمد
  • Widyan Abbas Ahmed
  • تدريسي : طب الاسنان
  • Teaching : Collage of Dentistry
  • ماجستير صناعه اسنان
  • B.D.S, M.Ds
  • Wedainabbas94@gmail.com
  • Wedainabbas94@gmail.com
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    Syllabuses

    Syllabuses - 2
    Dep. Step. Sem. code No. Des. Syllabuses
    Collage of Dentistry two full 4 المادة السنية Dental Material
    Collage of Dentistry three full 4 طب اسنان المجتمع

    Lectures

    Lectures - 10
    year syllabuses Dep. Step Lectures
    2024-2025 المادة السنية Dental Material Collage of Dentistry step 2 Epidemiology of Dental Caries
    2024-2025 طب اسنان المجتمع Collage of Dentistry step 3 Epidemiology of periodontal disease
    2024-2025 طب اسنان المجتمع Collage of Dentistry step 3 Environment and Health
    2024-2025 طب اسنان المجتمع Collage of Dentistry step 3 Dental Caries indices
    2024-2025 طب اسنان المجتمع Collage of Dentistry step 3 Occupation Hazards in Dentistry
    2024-2025 طب اسنان المجتمع Collage of Dentistry step 3 Dental public health
    2024-2025 المادة السنية Dental Material Collage of Dentistry step 2 Impression materials
    2024-2025 المادة السنية Dental Material Collage of Dentistry step 2 Gypsum products , Impression materials
    2024-2025 المادة السنية Dental Material Collage of Dentistry step 2 Mechanical properties of dental material
    2024-2025 المادة السنية Dental Material Collage of Dentistry step 2 Dental materials and physical properties

    Research

    2024 Indian journal of dental research
    Background: Premature degradation is the problem of maxillofacial silicones, significantly affected by ultraviolet exposure, contributing to silicones photodegradation. Degradation necessitates frequent replacement of prostheses that increase the total cost of rehabilitation. Aims: This study evaluated the effect of bisoctrizole on the ultraviolet absorption properties of silicone material and the stability of this absorption over time. Also, the bisoctrizole effect on the surface roughness of silicone was evaluated. Methods: There were 60 prepared specimens of room temperature-vulcanising maxillofacial silicone equally divided into two groups according to the conducted tests: ultraviolet absorption test and the surface roughness test. Each group was further subdivided into groups of 10 specimens based on the weight concentration of the ultraviolet (UV) absorber added: 0%, 1% and 2%. The UV absorbance of coloured specimens was measured before and after artificial weathering for 100 and 200 hours. Repeated-measures analysis of variance (ANOVA) was applied for UV absorption results, and one-way ANOVA was applied for the roughness test results to test the changing significances. Result: Bisoctrizole incorporation led to a highly significant improvement in ultraviolet absorption in all groups, maintaining a high level even after subjecting the specimens to artificial weathering. Furthermore, the addition resulted in a significant increase in surface roughness as the concentration of bisoctrizole increased. Conclusion: Despite the surface roughness changes, bisoctrizole demonstrated efficacy as a UV absorber for maxillofacial silicone, making it valuable for applications such as maxillofacial prosthetics that require UV protection.

    2024 Misan Journal of Academic Studies(MJAS)
    Abstract: This literature review emphasizes the impact of UV light on the deterioration of silicone used in maxillofacial prosthetics. Over time, the physical and mechanical properties of silicone degrade due to photodegradation. To tackle this issue, the study explores the use of Bisoctrizole, a photostable filler that effectively absorbs a wide range of harmful UV rays. By incorporating Bisoctrizole as a UV stabilizer, the longevity of maxillofacial silicone material can be extended, enhancing its resistance to photo-degradation. The review underscores the importance of including UV stabilizers, specifically benzotriazole components like Bisoctrizole, in silicone materials used for maxillofacial prosthetics.




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